JP3257601B2 - Spun yarn prepared yarn for cut pile and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun yarn for cut pile and a method for producing the same, and more particularly to a spun yarn for cut pile having a natural texture suitable for cut pile and excellent appearance quality. The present invention relates to a yarn and a method for producing the yarn.

[0002]

2. Description of the Related Art A cut pile fabric using ordinary filament yarn is characterized by a uniform surface and high productivity.
However, since these cut pile fabrics have an excessively uniform appearance quality, natural feeling is low, artificial appearance quality is not preferred, and there is a problem of whitening due to hair fall. As a method for solving this problem, there is a method using spun yarn. The advantage of spun yarn is that it has excellent bulky properties due to its micro-crimp, and it can express a natural appearance due to yarn spots. And other disadvantages that are difficult to have. However, spun yarn is liable to break and fly due to structural problems.
There is a problem that productivity becomes very poor. Furthermore, it is at present that the drawback of hair loss on cut pile fabric is induced, and improvement of these problems is desired. Thus, there is a method of using a filament crimped yarn to solve the above problem. However, the surface of the cut pile fabric using the filament crimped yarn has a felt-like shape in which a lot of curling has occurred, and is less durable and less durable than the spun yarn with crimped settling. Would.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a texture and a method for preventing the drawbacks such as felting and crimping settling, which are problems on a cut pile fabric using a conventional spun yarn for cut pile. An object of the present invention is to provide a spun yarn-like processed yarn for cut pile having excellent appearance quality.

[0004]

Means for solving the above problems, that is, in the present invention, a polyester yarn A having a birefringence Δn of 130 × 10 ⁻³ or more constitutes a core yarn, and the core yarn is Birefringence Δ having a weight ratio of 1.2 to 3.0 times
n is a multilayer composite yarn with Maki polyester yarn B constitutes a sheath yarn is a ^{20 × 10 -3 ~60 × 10 -3} , pre-1000 / D ^0.5 or the composite yarn 5000 / D
^After twisting with a twist number (t / m) of ^0.5 or less, crimp development rate CC obtained by performing false twisting at a false twist temperature of 80 ° C. or more and a thermal stress peak temperature of the polyester yarn A or less. (%)
Is 10% or less. (D indicates the total denier of the combined A and B yarns.)

The present invention also employs the following means. That is, in the present invention, the birefringence Δn is 130 × 1
A polyester yarn A is 0 ^-3 birefringence Δn
After twisting with a polyester yarn B in the range of 20 × 10 ^{−3 to} 60 × 10 ^{−3 in} the number of twists in the following range in advance,
A false twisting process for a cut pile, wherein the false twisting is performed at a false twist temperature of not less than (° C.) and not more than the thermal stress peak temperature (° C.) of the polyester yarn A. 1000 / D ^0.5 (t / m) ≦ T ≦ 5000 / D ^0.5 (t / m) where D is the thickness (denier) of the processed yarn.

Hereinafter, the present invention will be described in detail. In the present invention, the two or more filament yarns mainly indicate that the birefringence Δn and the thermal stress peak temperature of the polyester-based multifilament yarns are different from each other. Is terephthalic acid,
Alternatively, it is a polyester containing an ester-forming derivative thereof as a main dicarboxylic acid component and a glycol selected from ethylene glycol and 1,4-butanediol or an ester-forming derivative thereof as a main glycol component. A part of the dicarboxylic acid component may be, for example, a mono-alkali metal salt of 5-sulfoisophthalic acid, isophthalic acid, diphenyldicarboxylic acid, adipic acid, sebacic acid, P-
It may be replaced with oxybenzoic acid, or a part of the glycol component may be replaced with a dihydric alcohol such as diethylcyclohexane. Further, a polyalkylene oxide-based compound such as polyethylene glycol may be copolymerized with the produced polyester in an amount of 7% by weight or less to impart antistatic properties.
It is desirable to make the dye easily dyeable by copolymerizing a glycol represented by the following general formula at a ratio of 10% by weight (%). _{HO (C k H 2k O)} m R-O (C l H 2l O) n H ( the R is a divalent aliphatic hydrocarbon group having 4 to 20 carbon atoms,
k and l are the same or different integers of 2 to 4, and m and n are the same or different integers and 1 ≦ m + n ≦ 10) Further, a small amount of another polymer may be blended to obtain a modified polyester. Industry-known color inhibitors, catalysts,
A matting agent or the like can be appropriately used.

The yarn used as the core yarn naturally has the higher birefringence index Δn and the higher thermal stress peak temperature. Further, the crimp development rate CC of the obtained false twisted multilayer composite yarn is CC ≦ CC ≦
It is preferably 10%, and more preferably a range of 5% or less. When CC is in the range of 10%, felting, which is a problem of the cut pile fabric using the conventional spun yarn for cut pile, appears.
Not preferred. Crimp rate CC used here (%)
Can be obtained as follows. First, using a normal wrap reel, n = 2 skeins wound eight times were prepared with a tension of 0.1 g / d, and these were hooked.
It is immersed in hot water of 98 ° C. ± 2 ° C. dissolved in a concentration of g / l under no load for 5 minutes. Next, the sample is taken out, a load of the indicated denier × 0.2 × 8 × 2 g is applied in a wet state, and the length a after one minute is measured. Then, lightly drain the water, dry with hot air at 60 ° C. for 30 minutes, leave it at room temperature for 1 hour or more, apply a load of (2/1000) × 8 × 2 × g of indicated denier, and apply a load of 1 g for 1 minute. Measure b. The data of a and b thus obtained are substituted into the following equation to determine the crimp expression rate CC (%). CC (%) = [(ab) / a] × 100

[0008] The obtained false-twisted multilayer composite yarn has a thickness of 100
Twisting in the range 0 / D ^0.5 ≦ T (t / m) ≦ 5000 / D ^0.5 is provided. This is performed in order to prevent a defect such as a ground defect due to interference between the strains constituting the cut pile fabric and a defect such as crimping.
In the range of (t / m) <1000 / D ^0.5 , the effect is small, and conversely, T (t / m)> 5000 / D
If it is in the range of ^0.5 , the spun yarn-like appearance, which is the original purpose, is impaired, and a landslide defect occurs on cut pile fabric. Although the composition ratio of the filament yarn of the core and the sheath constituting the processed yarn is not particularly limited,
And a core> sheath relationship is preferable, and a more preferable range is a range of core = sheath × (1.2 to 3.0).

As a method for obtaining such a spun yarn for cut pile, a birefringence Δn of 130 ×
A polyester yarn having a thermal stress peak temperature of H (° C.) of not less than 10 ⁻³ and a polyester yarn having a Δn in a range of 20 to 60 × 10 ⁻³ are prepared in advance by 1000 / D ^0.5 ≦ T.
(T / m) ≦ 5000 / D After twisting with a twist number in the range of ^0.5 ,
False twisting is performed at a false twist temperature in the range of 80 ° C ≦ H1 (° C) ≦ H (° C). Here, Δn is 130 × 10
^-3 or more polyester yarn and Δn is 20 to 60 ×
The reason for using the polyester yarn in the range of 10 ⁻³ is that when crimping is applied in the subsequent false twisting processing, Δn is 130 × 10 ⁻³ or more with respect to the false twist temperature H (° C.). Since the thermal stress peak temperature H (° C.) of the polyester yarn is higher, crimping is less likely to occur, and thus crimping, which is a defect on cut pile fabric, is prevented. However, due to the crimping of the polyester yarn of Δn = 20 to 60 × 10 ⁻³ located on the sheath side, the bulky feeling and swelling characteristic peculiar to the spun yarn are not lost, and 1000 / D ^0.5 ≦ T (t /
m) Due to the twisting effect in the range of ≤5000 / D ^0.5 , the landslide defect on the cut pile fabric and the crimp sag are totally solved. Therefore, the polyester yarn constituting the core yarn used here has Δn of 130 × 1
It is preferably at least 0 ^-3 , and when it is less than 130 × 10 ^-3 , crimping is likely to occur during false twisting, which causes a problem such as crimp sag.
Further, Δn of the polyester yarn constituting the sheath yarn is 20 ×
It is preferably in the range of 10 ^{−3 to} 60 × 10 ⁻³ ,
When Δn <20 × 10 ⁻³ , a problem of a change with time occurs, and the physical properties of the obtained yarn vary, which is unsuitable for actual production. When Δn> 60 × 10 ⁻³ ,
An increase in the orientation in the physical properties occurs, and the occurrence of crimps decreases,
The spun yarn-like appearance tends to be impaired. Furthermore, the temperature H1 (° C.) during false twisting is 80 ° C. ≦ H1 (° C.) ≦ H
(° C.), and when H 1 (° C.) <80 ° C., the filament yarn constituting the sheath yarn is not sufficiently crimped and the spun yarn-like appearance is weakened, and conversely H 1 (° C.) > H
(° C.), the crimp of the core yarn becomes extremely high, and a felting defect occurs on the cut pile fabric. The false twisting direction is preferably the same as the twisting direction in order to cancel the torque and improve the handleability.

[0010]

【Example】

Example 1 A polyester yarn of 155 denier / 48 filament having a birefringence Δn of 190 × 10 ⁻³ and a thermal stress peak temperature of 239.4 ° C. and a birefringence Δn of 40 × 10 3
After pre-twisting with a polyester yarn of 80 denier / 48 filament of ^-3 in the Z direction at a twist number of 200 (t / m), a speed of 100 m / min and a fast heater temperature of 160 ° C. Then, a false twisting process of 1600 (t / m) is performed in a direction for eliminating the twisting torque, that is, in the Z direction. Then, as a result of performing heat setting with a second heater having a temperature of 210 ° C., the CC% (crimp development rate) of the obtained yarn was 3.26%. The yarn obtained in this manner was subjected to cut pile fabric evaluation using a 28-gauge tricot. The cut pile fabric did not have crimping, felting, or landslide defects, and was extremely excellent in appearance quality. A pile fabric was obtained.

Comparative Example 1 A polyester yarn of 155 denier / 48 filament having a birefringence Δn of 120 × 10 ⁻³ and a thermal stress peak temperature of 120 ° C., and a birefringence Δn of 40 × 10 ^−3.
80 denier / 48 filament polyester yarn is pre-twisted in the Z direction at a twist number of 200 (t / m), and then 1600 turns / in the Z direction at a speed of 100 m / min and a temperature of 160 ° C. m after false twisting
As a result of heat setting at a temperature of 10 ° C., the CC% of the obtained yarn was 46.75%. 2 using the obtained yarn
When a cut pile fabric was formed using an 8-gauge tricot and evaluated, the cut pile fabric had defects such as felting and crimp set.

Comparative Example 2 A polyester yarn of 155 denier / 48 filament having a birefringence Δn of 190 × 10 ^-3 and a thermal stress peak temperature of 239.4 ° C. and a birefringence Δn of 40 × 10 3
-1,80 turns / m in the Z direction at a speed of 100 m / min and a temperature of 160 ° C. without giving a twist to an 80 denier / 48 filament polyester yarn of ^-3.
, And then heat set with a second heater at 210 ° C. Using the polyester yarn obtained in this manner, a cut pile fabric was formed with a 28 gauge tricot, and evaluation was performed. Have interfered with each other and have been found to be found in places of twisting and landscaping defects.

Comparative Example 3 A polyester yarn of 155 denier / 48 filament having a birefringence Δn of 190 × 10 ^-3 and a thermal stress peak temperature of 239.4 ° C. and a birefringence Δn of 40 × 10 3
^-3 , 80 denier / 48 filament polyester yarn is pre-twisted in the Z direction at a twist number of 500 t / m, and then false twisted in the Z direction at a speed of 100 m / min and a temperature of 160 ° C. After the processing, the heat-set yarn at a temperature of 210 ° C. was cut into a pile fabric using a 28-gauge tricot. When the evaluation was performed, twist was applied to the polyester yarn constituting one pile per share. Because it was too deep, it was restrained by twisting near the tip of the pile, resulting in a lack of bulkiness and voluminousness.

[0014]

The spun yarn prepared yarn for cut pile according to the present invention, when used in cut pile fabric, does not cause crimping, felting, or landscaping, and has a natural texture and excellent texture. In addition, according to the manufacturing method, the above-described processed yarn can be easily manufactured.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification code FI D03D 27/00 D03D 27/00 A D04B 21/04 D04B 21/04 (58) Fields surveyed (Int.Cl. ⁷ , DB name) ) D02G 1/00-1/02 D02G 3/26-3/30 D02G 3/36-3/38 D03D 15/00-15/12 D03D 27/00-27/18 D04B 21/00-21/04

Claims (1)

(57) [Claims] 1. A polyester yarn A having a birefringence .DELTA.n of 130.times.10.sup.- ³ or more constitutes a core yarn and has a birefringence having a weight ratio of 1.2 to 3.0 times the core yarn. Rate Δn is 2
0 × 10 ^-3 ~60 × 10 ^-3 in which with Maki polyester yarn B a multilayer composite yarn that constitutes the sheath yarn, pre-1000 / D ^0.5 above 5000 / D ^0.5 or less merging the composite yarn After twisting with the number of twists (t / m), the crimping rate CC (%) obtained by performing false twisting at a false twisting temperature of 80 ° C. or more and a thermal stress peak temperature of the polyester yarn A or less. A spun yarn-processed yarn for cut pile characterized by being 10% or less. (D indicates the total denier of the combined A and B yarns.)